Growth Conditions and Vitality of Sphagnum in a Tundra Community Along the Alaska Pipeline Haul Road

Effects of road dust and road related construction upon Sphagnum lenense were found in one Sphagnum -rich tundra community along the Alaska Pipeline haul road. Dust, arising from vehicular traffic, settled in greatest quantities near the road with the amount rapidly decreasing away from the road. Water content of Sphagnum lenense in quadrats close to the road and to a buried gasline was generally low when compared with those of S. lenense in more distant quadrats. Total conductivity, pH, and calcium content of water extracted from the Sphagnum was greatest in heavily dust-impacted quadrats. Chlorophyll content (µg chlorophyll a/g dry weight plant tip) was greatest in Sphagnum lenense little exposed to dust and lowest in Sphagnum heavily exposed. Carbon uptake rates in Sphagnum lenense from quadrats far from the road were higher than uptake rates in quadrats near the road, as determined by fixation of 14C labeled CO2.

[1]  G. Knutsson,et al.  INFLUENCE OF ROADS ON THE SURROUNDING NATURAL ENVIRONMENT - VEGETATION, SOIL, AND GROUND WATER , 1980 .

[2]  J. Oertli,et al.  Changed pH-values on the vegetation along a motorway , 1979 .

[3]  Jerry Brown.  Ecological Baseline Investigations Along the Yukon River-Prudhoe Bay Haul Road, Alaska. , 1978 .

[4]  J. Busby,et al.  Water potential, water content, and net assimilation of some boreal forest mosses , 1978 .

[5]  B. M. Eller,et al.  Road dust induced increase of leaf temperature , 1977 .

[6]  M. C. Miller,et al.  EFFECTS OF ROAD CONSTRUCTION ON NEARBY LAKES ON ALASKA'S NORTH SLOPE. ANNUAL PROGRESS REPORT, MAY 1, 1975--JANUARY 31, 1976 , 1976 .

[7]  J. Mayo,et al.  Moisture stress and its effect on photosynthesis in Dicranum polysetum , 1975 .

[8]  D. Vitt,et al.  An analysis of the vegetation of Sphagnum-dominated kettle-hole bogs in relation to environmental gradients , 1975 .

[9]  J. Piatt,et al.  Road and site characteristics that influence road salt distribution and damage to roadside aspen trees , 1974, Water, Air, and Soil Pollution.

[10]  R. S. Clymo,et al.  THE GROWTH OF SPHAGNUM: SOME EFFECTS OF ENVIRONMENT , 1973 .

[11]  Ann M. Spearing.  Cation-exchange capacity and galacturonic acid content of several species of sphagnum in Sandy Ridge Bog, central New York State , 1972 .

[12]  A. W. Naylor,et al.  Large Effects of Small Water Deficits on Chlorophyll Accumulation and Ribonucleic Acid Synthesis in Etiolated Leaves of Jack Bean (Canavalia ensiformis [L.] DC.). , 1971, Plant Physiology.

[13]  S. W. Greene,et al.  Productivity of bryophytes in polar regions , 1971 .

[14]  R. S. Clymo.  THE GROWTH OF SPHAGNUM: METHODS OF MEASUREMENT , 1970 .

[15]  M. C. Pearson,et al.  THE ECOLOGY OF WYBUNBURY MOSS, CHESHIRE I. THE PRESENT VEGETATION AND SOME PHYSICAL, CHEMICAL AND HISTORICAL FACTORS CONTROLLING ITS NATURE AND DISTRIBUTION , 1968 .

[16]  R. S. Clymo.  Ion Exchange in Sphagnum and its Relation to Bog Ecology , 1963 .

[17]  George A. Bray,et al.  A simple efficient liquid scintillator for counting aqueous solutions in a liquid scintillation counter , 1960 .

[18]  P. Bell.  The Ability of Sphagnum to Absorb Cations Preferentially from Dilute Solutions Resembling Natural Waters , 1959 .

[19]  E. Nielsen.  The Interaction of Photosynthesis and Respiration and Its Importance for the Determination of 14C‐Discrimination in Photosynthesis , 1955 .

[20]  William G. Hopkins.  An Introduction to Plant Physiology , 1932, Nature.